[vath2001]

I am a believer in the "once a year in the Fall before winterizing" theory. I feel that a car using 9Q of synthetic motor oil in a 2.5L engine probably only needs once a year. The manual says every 15,000 miles.... but they also say to use Mobil 1.
Your oil changes depend upon how and where you drive. If your in the dusty desert all the time, you may need more frequent changes oil changes and air filter. Where I live, we need to change our wiper blades more ofter than air filters.